JPS6242233A - Module formation system - Google Patents

Abstract

PURPOSE:To attain the standardization of the program of a control module regardless of the constitution of a module to be controlled, by providing only the selection program for the module to be controlled into a program memory for the control module. CONSTITUTION:A control module 1 delivers the selection signal S1 to a selection signal line 9 for selection of a module to be controlled and then delivers '0' to an address bus 6 to read out the contents of the head address of a PROM 12 to the module 1 via data buses 5 and 30. The module 1 works successively and in accordance with the contents of the PROM 12 as long as the relevant bit pattern has the expected value. Then, the control module can perform the transfer of signals to outside via a shared memory 24. While a control part 25 sets address switch 26 at the side of an address bus 32 via data bus 28, the bus 32 and a TRREQ signal line for transfer of signals between the memory 24 and an external signal bus. Furthermore, an access is given to the memory 24 and the contents of the memory 24 are sent to the external signal line via an insulated transformer 33. The above-mentioned procedure is reversed in a reception mode.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a module configuration system for a digital control device composed of a control module and various controlled modules.

(Prior art and its problems) Figure 1 shows a block diagram of a digital control device made using a conventional module configuration method.

The operations of the controlled modules 2, 3, and 4 are controlled in accordance with the programs stored in the internal program memory 8 in the control module 1.

5Fi control module 1 and controlled module 213.4
6 is a data bus for exchanging signals between
r: An address bus for loading the entire address bus 6 from the control module 1 to the controlled modules 2, 3 .
4 and the area in which signals are to be exchanged is specified.

Reference numeral 7 denotes a control bus for writing data from the control module 1 to the controlled module, reading data from the controlled module to the control module 1, response signals, and other set signals to control the controlled module. It consists of signal lines.

In this conventional method, (1) various settings of the controlled module in the initial state (2) data exchange during normal operation (3) control of the controlled module during normal operation, etc. All the operations will be executed according to the program memory 8.

This caused the following problems.

(1) The contents of the program memory 8 are not determined until the controlled module to be connected is determined.

(2) It is necessary to change the program memory each time a version upgrade of the M control module occurs.

(3) The program type and program capacity of the siprogram memory 8 differ depending on the type and number of connected controlled modules, and cannot be standardized.

(Means for Solving the Problems and Object of the Invention) The present invention has been made to solve the above-mentioned problems, and is to provide a controlled module configured in each functional unit with a program for controlling that module. The control module is provided with a written program memory, and uses the program memory to control the controlled module.

And the purpose is (1)! The control program of the controlled module that is connected is made independent of the program memory within the entire control module.

(2) By integrating a program memory for controlling a controlled module with the controlled module, the type of controlled module can be determined by writing the controlled module identification code in the fF fixed area of the program memory and reading all of it. All history and internal settings can be read externally.

(3) The control module reads the internal state of the controlled module via a register or buffer, and checks whether the control module is operating at normal pressure.

etc.

(Example) Examples of the present invention will be described below.

FIG. 2 is a block diagram of a digital control device according to the present invention, in which 1 is a control module, 8 is its program memory, 2, 3.4 are controlled modules, 12, 13. 14
is a program memory containing programs necessary for controlling each controlled module. 5 is a data bus, 6 is an address bus, and 7 is a control bus. 9,10.1
Reference numeral 1 denotes a select signal line for selecting the program memory of each control module, data memory necessary for transmitting and receiving signals, and the like.

FIG. 3 is a program operation flow showing a program call by which a control module controls a controlled module and its operator Pti.

The control module 2 will be explained below with reference to Figures 2 and 3.
5 (Explain the procedure for controlling the M%ilJ control module.

The control module follows the program operation flow shown in FIG. 3, executes all 15 initial programs using the appropriate program stored in the program memory 8, and sets the initial state necessary for operating the device. Let's do it.

When this initial condition is completed, a select signal S of 10" (Low Level) is output to the select signal line 9 in FIG. 2, and the contents of the first address of the program memory 12 of the controlled module are read. Then, if the contents of the first address are normally the expected pit address (identification code of the controlled module), then the operation is executed according to the contents of the program memory 12.

For example, if the controlled module 2 does not exist, the bit bang that was expected when reading the contents of the first address of the program memory 12 does not occur on the data bus of the motherboard, and the control module 1 does not exist in the program memory. 1
It is determined that 2 is not present and this part of the operation is not performed.

In this way, program 1. Program 2. Program 3 can now be executed.

This situation will be explained using the program operation flow shown in FIG.

Selection 1 of 17 indicates a signal branch, and the select signal S is fully output to the select signal line 9, and the program memory 1
If the expected pit nozzle is output from 2, go to 81 and execute program 1. If the expected bit slam is not output, the process branches to BL, sets the select signal S and 7, outputs the select signal S2 to the select signal line 10, and enters the 1 selection 2 operation. In this way, the programs of the controlled modules are executed sequentially, and finally the self-diagnosis program 23 is executed, and the program execution of the controlled modules is started again.

FIG. 4 is a block diagram of a specific example of an implementation circuit so that the signal lines and the operation thereof can be understood schematically.

This embodiment shows an example in which a control module controls a controlled module that is intended to transmit signals to the outside via the shared memory 24.

Signal lines without numbers in the figure belong to control signal lines, and are omitted because they are not particularly necessary for the explanation.

The control module 1 connects the select signal 8 to the select signal line 9.
．． (By outputting SgLJ, the controlled module is selected, and by setting the address output to the address bus 6 to 0, the contents of the first address of the program memory 12 are transferred to the control module via the data bus 5.30.) As a result, if the P/A turn is the expected value, the operation will be executed according to the contents of the first-order program memory 12, and the control module will not send or receive signals to the outside. It is designed so that it can be done via shared memory.

In addition, when transmitting and receiving signals between the shared memory and the external signal bus, the control unit 25 communicates with the data bus 28, address bus 32, and TR, RE.
The Q signal line selects the address switch 26 to the address bus 32 side, accesses the shared memory 24, and transmits its contents to the external signal line via the isolation transformer 33. Reception is also performed in the opposite manner.

Note that 34 and 35 are stabilized power supplies that supply power to this device.

(Effects of the Invention) (1) By preparing only the selection program for the controlled module in the program memory of the control module and not including the control program for the controlled module,
Control module programs can be standardized regardless of controlled module structure.

(2) The controlled module program memory can be selected (contents of the first address) by a select signal for each controlled module. As a result, as can be seen from the program operation flow shown in FIG. 3, even if a controlled module is added, the program automatically operates, and there is no need to modify or change the program memory in the control module.

(3) As a result, just as with the conventional hardware-only configuration, by adding controlled modules to a single main unit, the functionality could be expanded using the building block method. It is also possible to expand the functionality of a module that includes a module by simply adding a controlled module without making any additional changes to the program.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional digital control device, FIG. 2 is a block diagram of a digital control device of the present invention, FIG. 3 is a program operation flow, and schematic diagram is a block diagram of a specific embodiment of the present invention. It is. 1... Control module 2... Controlled module 3... Controlled module 4... Controlled module 5... Data bus 6... Address bus 7... Control bus 8... Program Memory 9...Select signal line 10...Select signal line 11...Select signal line 12...Program memory 13...Program memory 14...Program memory 24...Shared memory 25... Control unit 26... Address changeover switch 27... Interface buffer gate circuit 28... Data bus 29... Data bus 30... Data bus 31... Address no. 32... Address no. 9th 33...Isolation transformer No. 3...DC stabilized power supply 35...DC stabilized power supply

Claims (1)

[Claims] In a digital control device in which a control module controls controlled modules configured in functional units via an address bus, a data bus, a control bus, etc., the program memory necessary for controlling the controlled modules is stored in each controlled module. A module configuration method characterized by having it within a module.